HD64F3039F18 Datasheet, PDF (167/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 7 I/O Ports
7.3.2 Register Descriptions
Table 7.3 summarizes the registers of port 2.
Table 7.3 Port 2 Registers
Address* Name
Abbreviation R/W
H'FFC1
Port 2 data direction
P2DDR
W
register
H'FFC3
Port 2 data register
P2DR
R/W
H'FFD8
Port 2 input pull-up
P2PCR
R/W
control register
Note: * Lower 16 bits of the address.
Initial Value
Modes 1 and 3 Modes 5 to 7
H'FF
H'00
H'00
H'00
H'00
H'00
Port 2 Data Direction Register (P2DDR)
P2DDR is an 8-bit write-only register that can select input or output for each pin in port 2.
Bit
7
6
5
4
3
2
1
0
P2₇DDR P2₆DDR P2₅DDR P2₄DDR P2₃DDR P2₂DDR P2₁DDR P2₀DDR
Modes ^{Initial value 1}
1
1
1
1
1
1
1
1 and 3 _{Read/Write —}
—
—
—
—
—
—
—
Modes ^{Initial value 0}
0
0
0
0
0
0
0
5 to 7 _{Read/Write W}
W
W
W
W
W
W
W
Port 2 data direction 7 to 0
These bits select input or
output for port 2 pins
P2DDR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode
it retains its previous setting. If a P2DDR bit is set to 1, the corresponding pin maintains its output
state in software standby mode.
Rev.3.00 Mar. 26, 2007 Page 143 of 682
REJ09B0353-0300